Buggy code:
gbc_txtEnterPointsEarned_1 . insets = new Insets ( 0 , 0 , 5 , 5 ) ; gbc_txtEnterPointsEarned_1 . gridx = 0 ; gbc_txtEnterPointsEarned_1 . gridy = 7 ; frame . getContentPane ( ) . add ( txtEnterPointsEarned_1 , gbc_txtEnterPointsEarned_1 ) ; txtEnterPointsEarned_1 . setColumns ( 10 ) ; lblCanPoints = new JLabel ( "Can<seq2seq4repair_space>Points" ) ; GridBagConstraints gbc_lblCanPoints = new GridBagConstraints ( ) ; gbc_lblCanPoints . insets = new Insets ( 0 , 0 , 5 , 0 ) ; gbc_lblCanPoints . gridx = 1 ; gbc_lblCanPoints . gridy = 7 ; frame . getContentPane ( ) . add ( lblCanPoints , gbc_lblCanPoints ) ; txtEnterMaximumHeight_1 = new JTextField ( ) ; txtEnterMaximumHeight_1 . setText ( "Enter<seq2seq4repair_space>Maximum<seq2seq4repair_space>Height<seq2seq4repair_space>of<seq2seq4repair_space>Stacked<seq2seq4repair_space>Cans" ) ; GridBagConstraints gbc_txtEnterMaximumHeight_1 = new GridBagConstraints ( ) ; gbc_txtEnterMaximumHeight_1 . fill = GridBagConstraints . HORIZONTAL ; gbc_txtEnterMaximumHeight_1 . insets = new Insets ( 0 , 0 , 5 , 5 ) ; gbc_txtEnterMaximumHeight_1 . gridx = 0 ; gbc_txtEnterMaximumHeight_1 . gridy = 8 ; frame . getContentPane ( ) . add ( txtEnterMaximumHeight_1 , gbc_txtEnterMaximumHeight_1 ) ; txtEnterMaximumHeight_1 . setColumns ( 10 ) ; lblCanHeight = new JLabel ( "Can<seq2seq4repair_space>Height" ) ; GridBagConstraints gbc_lblCanHeight = new GridBagConstraints ( ) ; gbc_lblCanHeight . insets = new Insets ( 0 , 0 , 5 , 0 ) ; gbc_lblCanHeight . gridx = 1 ; gbc_lblCanHeight . gridy = 8 ; frame . getContentPane ( ) . add ( lblCanHeight , gbc_lblCanHeight ) ; txtEnterPointsEarned_2 = new JTextField ( ) ; txtEnterPointsEarned_2 . setText ( "Enter<seq2seq4repair_space>Points<seq2seq4repair_space>Earned<seq2seq4repair_space>by<seq2seq4repair_space>Litter" ) ; GridBagConstraints gbc_txtEnterPointsEarned_2 = new GridBagConstraints ( ) ; gbc_txtEnterPointsEarned_2 . fill = GridBagConstraints . HORIZONTAL ; gbc_txtEnterPointsEarned_2 . insets = new Insets ( 0 , 0 , 5 , 5 ) ; gbc_txtEnterPointsEarned_2 . gridx = 0 ; gbc_txtEnterPointsEarned_2 . gridy = 9 ; frame . getContentPane ( ) . add ( txtEnterPointsEarned_2 , gbc_txtEnterPointsEarned_2 ) ; txtEnterPointsEarned_2 . setColumns ( 10 ) ; lblLitterPoints = new JLabel ( "Litter<seq2seq4repair_space>Points" ) ; GridBagConstraints gbc_lblLitterPoints = new GridBagConstraints ( ) ; gbc_lblLitterPoints . insets = new Insets ( 0 , 0 , 5 , 0 ) ; gbc_lblLitterPoints . gridx = 1 ; gbc_lblLitterPoints . gridy = 9 ; frame . getContentPane ( ) . add ( lblLitterPoints , gbc_lblLitterPoints ) ; txtEnterNumberOf = new JTextField ( ) ; txtEnterNumberOf . setText ( "Enter<seq2seq4repair_space>Number<seq2seq4repair_space>of<seq2seq4repair_space>Totes<seq2seq4repair_space>Litter<seq2seq4repair_space>is<seq2seq4repair_space>Scored<seq2seq4repair_space>On" ) ; GridBagConstraints gbc_txtEnterNumberOf = new GridBagConstraints ( ) ; gbc_txtEnterNumberOf . fill = GridBagConstraints . HORIZONTAL ; gbc_txtEnterNumberOf . insets = new Insets ( 0 , 0 , 5 , 5 ) ; gbc_txtEnterNumberOf . gridx = 0 ; gbc_txtEnterNumberOf . gridy = 10 ; frame . getContentPane ( ) . add ( txtEnterNumberOf , gbc_txtEnterNumberOf ) ; txtEnterNumberOf . setColumns ( 10 ) ; lblLitterHeight = new JLabel ( "Litter<seq2seq4repair_space>Height" ) ; GridBagConstraints gbc_lblLitterHeight = new GridBagConstraints ( ) ; gbc_lblLitterHeight . insets = new Insets ( 0 , 0 , 5 , 0 ) ; gbc_lblLitterHeight . gridx = 1 ; gbc_lblLitterHeight . gridy = 10 ; frame . getContentPane ( ) . add ( lblLitterHeight , gbc_lblLitterHeight ) ; txtEnterPointsEarned_3 = new JTextField ( ) ; txtEnterPointsEarned_3 . setText ( "Enter<seq2seq4repair_space>Points<seq2seq4repair_space>Earned<seq2seq4repair_space>by<seq2seq4repair_space>Coopertition" ) ; GridBagConstraints gbc_txtEnterPointsEarned_3 = new GridBagConstraints ( ) ; gbc_txtEnterPointsEarned_3 . fill = GridBagConstraints . HORIZONTAL ; gbc_txtEnterPointsEarned_3 . insets = new Insets ( 0 , 0 , 5 , 5 ) ; gbc_txtEnterPointsEarned_3 . gridx = 0 ; gbc_txtEnterPointsEarned_3 . gridy = 11 ; frame . getContentPane ( ) . add ( txtEnterPointsEarned_3 , gbc_txtEnterPointsEarned_3 ) ; txtEnterPointsEarned_3 . setColumns ( 10 ) ; lblCoopertitionPoints = new JLabel ( "Coopertition<seq2seq4repair_space>Points" ) ; GridBagConstraints gbc_lblCoopertitionPoints = new GridBagConstraints ( ) ; gbc_lblCoopertitionPoints . insets = new Insets ( 0 , 0 , 5 , 0 ) ; gbc_lblCoopertitionPoints . gridx = 1 ; gbc_lblCoopertitionPoints . gridy = 11 ; frame . getContentPane ( ) . add ( lblCoopertitionPoints , gbc_lblCoopertitionPoints ) ; txtEnterAdditionalNotes = new JTextField ( ) ; txtEnterAdditionalNotes . setText ( "Enter<seq2seq4repair_space>Additional<seq2seq4repair_space>Notes<seq2seq4repair_space>Here" ) ; GridBagConstraints gbc_txtEnterAdditionalNotes = new GridBagConstraints ( ) ; gbc_txtEnterAdditionalNotes . insets = new Insets ( 0 , 0 , 5 , 5 ) ; gbc_txtEnterAdditionalNotes . fill = GridBagConstraints . HORIZONTAL ; gbc_txtEnterAdditionalNotes . gridx = 0 ; gbc_txtEnterAdditionalNotes . gridy = 12 ; frame . getContentPane ( ) . add ( txtEnterAdditionalNotes , gbc_txtEnterAdditionalNotes ) ; txtEnterAdditionalNotes . setColumns ( 10 ) ; lblAdditionalNotes = new JLabel ( "Additional<seq2seq4repair_space>Notes" ) ; GridBagConstraints gbc_lblAdditionalNotes = new GridBagConstraints ( ) ; gbc_lblAdditionalNotes . insets = new Insets ( 0 , 0 , 5 , 0 ) ; gbc_lblAdditionalNotes . gridx = 1 ; gbc_lblAdditionalNotes . gridy = 12 ; frame . getContentPane ( ) . add ( lblAdditionalNotes , gbc_lblAdditionalNotes ) ; btnSubmit = new JButton ( "Submit" ) ; GridBagConstraints gbc_btnSubmit = new GridBagConstraints ( ) ; gbc_btnSubmit . insets = new Insets ( 0 , 0 , 0 , 5 ) ; gbc_btnSubmit . fill = GridBagConstraints . HORIZONTAL ; gbc_btnSubmit . gridx = 0 ; gbc_btnSubmit . gridy = 14 ; frame . getContentPane ( ) . add ( btnSubmit , gbc_btnSubmit ) ; <START_BUG> Scouting_GUI . HandlerClass handler = new Scouting_GUI . HandlerClass ( txtEnterTargetTeam , txtEnterMatchNumber , txtEnterPointsEarned , txtEnterMaximumHeight , txtEnterPointsScored , txtEnterPointsEarned_1 , txtEnterPointsEarned_2 , txtEnterNumberOf , txtEnterPointsEarned_3 , txtEnterAdditionalNotes , txtEnterYourName , txtEnterMaximumHeight_1 ) ; <END_BUG> btnSubmit . addActionListener ( handler ) ; } private class HandlerClass implements ActionListener { private JTextField targetTeam ; private JTextField matchNumber ; private JTextField totePoints ; private JTextField toteHeight ; private JTextField autoPoints ; private JTextField canPoints ; private JTextField canHeight ; private JTextField literPoints ; private JTextField literHeight ; private JTextField coopPoints ; private JTextField addNotes ; private JTextField scoutName ; private HandlerClass ( JTextField textfield1 , JTextField textfield2 , JTextField textfield3 , JTextField textfield4 , JTextField textfield5 , JTextField textfield6 , JTextField textfield7 , JTextField textfield8 , JTextField textfield9 , JTextField textfield10 , JTextField textfield11 , JTextField textfield12 ) { } public void actionPerformed ( ActionEvent event ) { } } }

Fix:
Scouting_GUI . HandlerClass handler = new Scouting_GUI . HandlerClass ( txtEnterTargetTeam , txtEnterMatchNumber , txtEnterPointsEarned , txtEnterMaximumHeight , txtEnterPointsScored , txtEnterPointsEarned_1 , txtEnterMaximumHeight_1 , txtEnterPointsEarned_2 , txtEnterNumberOf , txtEnterPointsEarned_3 , txtEnterAdditionalNotes , txtEnterYourName ) ;